# 试验：参数传递
def test1():
    a = 2
    b = 3
    return a, b


def test2(x):
    re = x * 2
    print(re)


if __name__ == '__main__':
    re = test1()
    print(re)
    print(type(re))
    test2(re)

# s1 = set()
# s2 = {}
# print(type(s1))
# print(type(s2))
